Locomotive truck



y 1931. E. o. ELLIOTT 1,805,328

LOCOMOTIVE TRUCK Filed (2:17. 29, 1950 5 \Sheets-Skieet 1 .Zueziar: 1 lwwwdgw w fW ffw E. O. ELLIOTT LOCOMOTIVE TRUCK May 12, 1931.

Filed Nov. 29, 1930 5 Sheets-Sheet 2 5 Sheets-Sheet 3 .Zvenf; M ba 7 May 12, 1931. E. o. ELLIOT? LOCOMOTIVE TRUCK Filed Nov. 29, 1930 May 12, 1931. ELLIOTT 1,805,328

LOCOMOTIVE TRUCK Filed Nov. 29, 1950 5 Sheets-Sheet 4 May 1931. E. o. ELLIOTT 1,805,328

LOCOMOTIVE TRUCK Filed Nov. 29, 1930 5 Sheets-Sheet 5 Patented May 12, 1931 airs) STATES EDWfLRD 0. ELLIOTT, OF JENKINTOWN, PENNSYLVANIA LOCOMOTIVE TRUCK Application filed November 29, 1930. Serial No. 499,083.

My invention relates to certain improvements in two-wheel locomotive trucks having a radius bar.

The object of my invention is to simplify the construction of'a truck of this type and to provide transverse semi-elliptical springs supporting the bolster upon a rocker frame, which is carried by the main frame.

A further object of the invention is to so design the truck that a combined lateral movement of the truck in relation to the engine frame will result, the bolster first swinging on the links, until stopped by the rocker casing, after which the rocker casing will continue the movement transversely on its rockers.

The invention also relates to certain details which will be described hereinafter.

In the accompanying drawings Fig. 1 is a plan view of my improved truck, the center pin being in section;

Fig. 2 is a longitudinal sectional view on the line 22, Fig. 1

Fig. 3 is a longitudinal sectional view on the line 33, Fig. 1;

Fig. 4 is a transverse sectional view on the line 14:, Fig. 1;

Fig. 5 is a transverse sectional view on the line 55, Fig. 1;

Fig. 6 is a detached perspective view of one of the rockers;

Figs. 7 and 8 are views illustrating modifications of the invention;

Fig. 9 is a view of a modification of the linkage; and

Fig. 10 is a plan view with the bolster and springs removed, showing the main frame and rockers.

1 is the main frame of the truck, having in the present instance an integral radius bar 2, but this radius bar may be made separate from the frame and bolted thereto if desired, without departing from the essential features of the invention. The frame 1 has side members 33, in which are housings 44 forming part of the axle boxes, through which extends the axle 6, having wheels 7, which are located outside the frame. The housin 's are parted along the longitudinal center line m. In the present instance, in the arale boxes 5 are roller readily mounted on the axle.

bearings. Thesebearings in the present instance are solid and are mounted on the axle before the wheels are applied, but they may be split, if necessary, so that they can be Other types of bearings may be used without departing from the essential features of the invention. The roller-bearings are lubricated from the lower sections of the boxes, which are in the form of cellars 4a, secured in place by bolts 8, which pass through lugs 9 on the housings, and lugs 10 on the cellar structure.

The rocker casing 11 is mounted on two sets of rockers 12, which are supported by the main frame 1. The rockers are arranged in pairs and the rockers 12a of each pair are connected by a cross-bar 13, Fig. 6. The lower end of each rocker has two rounded projections 14:, which fit sockets in the seat plate 15. These seat plates are mounted on brackets 7 16, forming an integral part of the frame 1, and the plates are prevented from longitudinal movement by shoulders at each end of the bracket. The upper end of each rocker is heart-shaped and supports the rocker casing 7 11, the rockers in the present instance resting against seat plates 18, which are V-shaped on the underside and are held against longitudinal movement by the flanges 19 on the rocker casing. Each plate has two V-shaped so recesses for the two rockers.

The center pin bolster 17 is located between two upright flanges 20 on the rocker casing 11, so as to prevent any lateral movement of the center pin bolster independently as of the rocker casing. On the center pin bolster is a center pin 21, which is guided in the cross-tie 22 of the main frame of the locomotive, and the load is transmitted from the forward part of the locomotive, in the present instance, through an equalizing beam 23, and a link 24, to the center pin 21 of the bolster 17, see Fig. 3.

The rocker casing 11 extends down at each end of the frame, as shown at 11a and has a sliding contact with the frame, so that it will be centered against forward and aft movement in the frame, but allowed to move transversely within the frame. The center pin bolster has arms 25 which extend beyond the 7. 7"-

rocker casing, as shown in Fig. 2, and attached to these arms are the semi-elliptical springs 26, the center portions of the springs resting against the arms and secured thereto, in the present instance, by hooked rods 27, which underlap the springs and pass through openings in the arms 25, and are secured in position by nuts. The ends of the semi-elliptical springs 26 rest upon spring plates 28 carried by keys 29 on links 30. These links extend through slots in the ends of the springs in the ordinary manner. The links are hung from pins 31 on the rocker casing 11. The rocker casing 11 can move on its rockers transversely in respect to the truck, and the links suspend the springs and the center pin bolster from the rocker casing, but have no independent movement in respect to the rocker casing in the present instance, although in some instances the upwardly extending flanges 20 may be located a distance away from the edges of the bolster to allow a slight movement if necessary. In order to prevent the lower portions of the rocker casing from spreading or closing in, tie bolts 32 and spacers 32a connect the two depending portions under the axle. The lower portion of the main frame 1 is also prevented from spreading by a tie bolt 33.

In some instances the links 30 may be dispensed with and the ends of the springs 26 may rest upon seats 84, which project from the rocker casing 11 in the form of brackets (Figs. 7 and 8). In the present instance each spring has a rocker plate which is connected to the spring and which rocks upon the said brackets. lVhile I have shown the rocker seat plates made separate from the main frame and the rocker casing, in some instances these plates may be made integral with the parts without departing from the essential features of the invention.

\Vhen the upstanding flanges are located some distance from the center pin bolster as shown in Fig. 9, then instead of using the single pin from which the link is suspended,

two pins may be used and the three point suspension type of rocking link may be substituted for the single pin link without departing from the essential features of the invention. This will give a combined lateral movement of the truck in relation to the en gine frame. Thus the bolster will swing on the links until resisted by the stops 20 on rocker casing 11, after which the rocker casing will continue to move transversely on rockers 12.

I claim:

1. The combination in a locomotive truck, of a main frame; rockers resting upon the frame; a rocker casing supported by the rockers; a center pin bolster located above the rocker casing and having arms; semielliptic springs having their center-bearings springs being carried by the rocker casing; an axle; and boxes for the axle, said boxes being mounted in the main frame.

2. The combination in a locomotive truck, of a main frame; rockers resting upon the frame; a rocker casing supported by the rock ers; a center pin bolster located above the rocker casing and having arms; semi-elliptic springs having their center bearings on the underside of the arms, the ends of the springs being carried by the rocker casing; an axle; boxes for the axle, said boxes being mounted in the main frame, the said main frame having depending portions; and a tiebar connecting the depending portions of the main frame, said bar extending under the main frame.

3. The combination in a locomotive truck, of a main frame; rockers resting upon the frame; a rocker casing supported by the rockers; a center pin bolster located above the rocker casing and having arms; semielliptic springs having their center hearings on the underside of the arms, the ends of the springs being carried by the rocker casing; an axle; boxes for the axle, said boxes being mounted in the main frame, the rocker cashaving depending portions bearing against the main frame; and tie-bars and spacers extending from one depending portion of the rocker casing to the other under the axle, holding the lower portion of the rocker casing in position.

l. The combination in a two-wheel swing truck, of a main frame having a radius bar; axle boxes on the main frame; an axle extending through the boxes; wheels on the axle outside the frame; a rocker casing mounted above the frame; rockers between the main frame and the rocker casing; a center pin bolster located above the rocker casing and having arms; transversely arranged scmielliptic springs having their center bearings on the arms and having their outer ends carried by the rocker casing; means for preventing lateral movement of the center pin bolster independent of the rocker casing; a center pin on the bolster; a cross tie in which the center pin is mounted; and an equalizing beam connected to the center pin.

5. The combination in a locomotive truck, of a main frame; boxes in the main frame; axles extending through the boxes; wheels on the axles beyond the boxes, said main frame having rocking plates at each side of the axle; rockers on the plates; a rocker casing located above the main frame and resting upon the rockers; a center pin bolster located above the rocker casing and having a center pin; arms on the center pin bolster extending beyond the rocker casing; transverse semielliptical springs having center bearings on the arms; and links connecting the outer ends of the springs to the rocker casing. on the underside of the arms, the-ends of the 6. The combination in a locomotive truck,

of a main frame; boxes mounted in the main frame; an axle extending through the boxes; wheels on the axle beyond the boxes; a rocker casing mounted above the main frame and having portions extending on either end of the frame and having wall surfaces abutting the frame, and having upwardly extending flanges spaced apart; a center pin bolster mounted above the said rocker casing and between the flanges and having a center pin; arms on the center pin bolster extending beyond the rocker casing; semi-elliptical springs having a center bearing on the underside of the arms; links connecting the outer ends of the springs with the rocker casing; and rockers between the main frame and the rocker casing.

7. The combination in a locomotive truck, of a main frame; boxes mounted in the main frame; anti-friction bearings located in the boxes, said boxes being made in halves, one half being a permanent part of the main frame, the other part being removable; vertical bolts securing the removable part to the frame; brackets; rockers mounted on the brackets; a rocker casing mounted on the rockers; a center pin bolster located above the rocker casing and having arms; transversely arranged semi-elliptical springs having their center bearings on the underside of the arms, the outer ends of the springs being supported by the rocker casing; and a radius bar projecting from the main frame.

8. The combination in a locomotive truck, of a main frame; a rocker frame mounted above the main frame; rockers between the main frame and the rocker frame; a center pin bolster mounted above the rocker frame and having arms extending beyond the rocker frame; transversely arranged semielliptical springs having their center bearings on the underside of the arms; and hooks secured to the arms and extending under the said springs, the outer ends of the springs being supported by the rocker casing.

EDWARD O. ELLIOTT. 

